For 99% of the drivers out there the DCT will be easier to drive and easier to drive faster. For the 1% of super skilled drivers the difference would be minute.

With the DCT you can just yank on the paddle and downshift before a corner, with a manual you have to heel toe your downshift and depending on the speed and corner you will have to brace yourself with some combination of the steering wheel, knee, feet etc while doing the heel toe.